Linnaeus, 1763: 413
Robber flies (Insecta: Diptera: Asilidae) of Wyoming, USA with keys to genera and species
Lavigne, Robert J.
Dennis, Steve
Zootaxa
2019
2019-08-30
4662
1
1
126
(Linnaeus)
Linnaeus
[151,467,692,719]
Insecta
Asilidae
Nerax
GBIF
Animalia
Diptera
37
38
Arthropoda
species
aestuans
Asilus aestuans Linnaeus, 1763: 413.
Recognition characters:Grayish-black species; length 18–20 mm; mystax black above, white below with few black bristles on oral margin; bristles and setae of mesonotum largely black with white setae posteriorly; meral bristles black in both sexes; scutellar setae white, marginal bristles black; males with abdominal segments 5–7 silvery white pollinose, sternite 8 produced apically with long black setae; legs, femora black, tibiae brown fading to black apically. Distribution:Recorded from Wyomingby Cole (1969)(as Efferia aestuans); Fisher & Wilcox (1997)(as Efferia aestuans); Geller-Grimm (2018). Habitat:Sagebrush steppe and wheatgrass-needlegrass shrub steppe shrub and grassland, and grama-needlegrass-wheatgrass, grama-buffalo grass, and wheatgrass-needlegrass grassland vegetation types. Ethology:Nothing known. Prey:None known.